How is the general volume knob and playing dynamic cleanup with the SD? Does it do the Fuzzface turn-your-volume-down-to-9-and-it-cleans-right-up kind of thing, or is it more gradual? How does the Screwdriver compare to the Sunface from Analogman? I just got my Sunface in, and I'm loving it, but I think I want an overdrive kind of pedal to go with it. Do they overlap at all? How is the Screwdriver's gain range in comparison to the Sunface's, does it get any higher gain? Does anybody run both? My SF is a TI/UK, btw. Thanks.